Machine for re-dressing tenpins or the like



' Oct. '4, 1927.

F; L.-..IOHN$ON MACHINE FOR REDREISSING .TENPINS OR THE LIKE Filed Oct. 11, 1924 1 fiA/wr Z. 0

B) ATTORNE 1 Patented Get. 4,1927.

' one end, a chuck 17 so formed as to receive .is to j UNITE a FRANKL;

JOHNSON, OF AKROIiT OHIb. V

MACHINE, r03 RE-nrtnssme r nivrligrso nn .1m.

Application filed October 11, 1924; Serial No. 742,060. 1

This invention relates to wood working machinery and'particularly to machinery for redressing ten pins, duck pins, and'the like.

The purpose of the invention, in general, provide an apparatus capable of being inexpensively constructed particularly for the use of owners of bowling alleys, whereby they can redress their own pins at a considerable saving of time and expense. Accordingly the end in view is a light, motordriven unit in which a pin may be readily mounted and from which it is easily removed, the unit being adapted to rotate the pin ata rapid rate and also adapted to redress the bottom of the pin so that it will stand in the proper manner on the'alley. The foregoing and other objects will be better understood when the following'description of the invention is read in con-' nection with the accompanying drawings which illustrate the same, it being understood that the invention is not limited to the specific forms thereof illustrated and described.

Of the accompanying drawings:

Figure 1 is a plan partly in section of one form of device embodying the invention; I Figure 2 is a side elevation partly in section thereof; V

Figure 3 is a part plan of amodified form of the redressing device; I Figure 4 is an enlarged detail thereof; and

Figure 5 is a detail feeding lever. 5

Referring to the drawings, 10*is' a base casting on which the various parts of the device are mounted. On the base 10, a motor 11 may be mounted whereby the unit will be self contained. The motor 11 may end elevation of the be dispensed with where other sources power are available for driving a work rotating pulley 12. In'the present case the latter is driven by a belt 13 which is driven by a pulley l1 on the motor.

Pulley 12 is keyed onto a shaft 14 which may be hollow as shown and which is arranged to slide and rotate in bearingslo, 15 formed on base 10, a. key-way 16 being provided in the shaft to permit of the. sliding thereof relative to pulley 12 which'is arranged on the shaft between bearings 15. Oiling devices 15, 15? may be provided for bearings 15. .Shaft 14 has secured on wl'ien the dressing bear against and grip the head of apin indicated at'18, the'chuck 17 being formed a s a hollow 'cyl' inder'having taperingribs 17, 17 inner surface'for pin. .The shaft 1a is arrangedto beslid in bearings 15 by a lever. 19. pivoted at 20, 20 to a sleeve 21 which is heldon shaft 14; by collars 22, 22 the inner one of which may be formed on the shaft as shown. Lever 19 is. pivoted on a link 23 which is pivoted on base 10. Slidable within the shaft 14 there is arranged a pin ejector'rod 24c hav; ing a head as thereon extending into the chuck 1'7. Anejector .stop 25 is mounted. so as to engage the rear end of the ejector rod 1 operations are complete for the purpose of forcing the head of the pin 18 out of the chuck.

For rotatabiy mounting the bottom of the pin 18 in alignment with chuck. 17, acenter 26 is employed. The center26i is slidably "mounted in bearings 27, 27 formed on base adapted to fit. The center has an enlarged taperedshoulder 26 which is adapted to the countersunk portion 18 which provides the base on which the pin 1s supported in use. Accordingly spring 30 normally will urge the pin 18, and the chuck 17 to the ieft as shown in the drawing.

Arranged. for cutting operations on the bottom of the pin is a tool 32, mounted on a support. 33 which is pivoted on a pin 34: extendinginto a socket. 35 formed in the base 10. The cutting edge of thetool 32 is arranged so as to intersect the axis of the pivot as clearly apparent from Figures 1 and 2. Thesupport 33 has formed thereon a hand lever 36 by which it may be operated to first dress the bottom and then the sides of the pin adjacent the bottom, the tool being movable to the dotted. line; shown in Figure 1 for this latter A stop pin 36 is arranged for with the support purpose. engagement whichis notched at 33,

position v so as to provide means for limiting move- Y employed, the tool 37 being suitably sup ported base '10. Instead wagin a f secondvtool, as shown'inF g 5 tool (Figure adapted'to dress e ,7 s3 and4) may be substituted for tool-'32. As best shown in Figure 4 this tool on center 26, it is I sanded, either before or after dressing while held or 37 by spring bottom of thepin against tools 32 and 37 or i rod '24 to engage stop 25 whereby "the pin'is pushed out of the chuck. g f Modifications, of the invention may be 25 i a 4.. After the'bottom is .-;=the tool 32 or 32* is position (Figure 1') 1, A machine prising a tool, a shiftable chuck, and a shift-. able center, yielding means" fagainst tool 32 while in the position shown infull lines in Figure 1 or in Figures 3 and properly" dressed swung to the dotted line and its lowersurface is also "dressed. Y The reconditioned pin may now. be removed by'dra-wi'ng the chuck 17 backwardly by lever 19, this causing ejector resorted without departing-afr'om the s' irit thereof or the-scope of the appended What is claimed is; i V

of the class described, com-:

for s urging the is mounted in the? cent the bottom.

chuck and center in one direction when'the' vwork isfsupported thereby so as to hold the work away from the tool, means for shifting, {the chuck and center to carry the work against means operable on-the ejector, when the chuck and center are shifted so as to carry the work away from the tool, whereby th work will beejected from the chuck.

:35 the tool, an ejector in the chuck and '2. A machine 'of' the class described comprising, means for supporting the work,;a tool, means for relatively shifting the means and'the' tool, a piyoted mount-f- '45 line intersecting the axis of the ing for the tool, the cutting edge of said tool being on a pivot whereby the tool may operate successively on an end and on the surface of. the work, or viceversa, to dress the edge of the Work defined byvsaid end and said surface; j

3-. A machine for redressing tenpins or and rotating the like comprising, means for supporting and rotating the Work, and :a pivotallys mounted tool, said tool havlng cutting edges for simultaneously dressing a countersink in the bottom of the pin and the bottom of the 7' P edge said tool being pivoted with the cutting for dressing the bottom intersecting the" axis of the pivot so as tobe swung to a'posi' tion to dress the surface of the work adja- FRANK n JOHNSON. 

